you can already tell they all have extreme potential the priest can battle as well as mc and will most likely eventually learn how to heal, the summoner clearly has a link to a very dangerous summening plane, the green guy can make outstanding herbs and will eventually learn how to use magic, cai er should get her sight back as if you remember in the beginning she couldn't talk but now she can and also then she could see and now she cant so im guessing they were training her senses or something like that. this is all assumption from what ive seen so far,. it kinda reminds me of soul land and tang li and his crew